I was preparing here for the IELTS exam last year - I passed it 1.5 months after graduating at 6.5, so I’ll say with confidence that the course is excellent and useful.
The groups are very small: the teacher asks everyone and not once, constantly gives common projects, we work with dialogs, etc. They give a lot of examples of examination sheets (as I understood, over the past years) - they took them apart at the lessons, and you could take a copy home, look more closely at the types of tasks and the next day ask the teacher and clarify something. The course is quite intense, so you need to go with good preparation, otherwise you won't study much new and difficult material.
Living conditions are good, but I'm not picky here, I don’t need much. Near the school there is a very cozy coffee house.